Wrench and clamp.



No. 674,278. Patented may. I4, |901.

.1. McuuT'T. WRENCH' AND CLAMP.

(Application med oct. 3,1990.;- (No ModeL) 2 Sheets-Sheet l.

No; 674,278. Y Patented may I4, |901.

J. McNu'rT.

WRENCH AND CLAMR (Application 81nd Oct. 3. 1900.) (No Model.) I l 2Sheets-Sheet 2..

we Nonms Perlas co., PNoYoLlTno.. wAsnyNnTou. n. c,

UTTED STATES PATENT OFFICE.

JAMES MCNUTT, OF PHILADELPHIA, PENNSYLVANIA.

WRENCH AND CLAMP.

SPEClFIGATION forming part of Letters Patent No. 674,278, dated May 14,1901.

Application filed October 3, 1900. Serial No. 311915. (No model.)

To all whom t may concern:

Be it known that I, JAMES MCNUTT, a citizen of the United States,residing in Philadelphia, Pennsylvania, have invented certainImprovements in Wrenches and Clamps, of which the following is aspecification.

My invention relates to that class of clamps and wrenches in which aslide on the stem 0r shank of the wrench carries a lever upon which ismounted a secondary lever, screw,`

or other clamping device, the objects of my invention being to soconstruct such a clamp or wrench as to obtain the maximum of strengthwith the minimum of weight, to insure a powerful gripping action uponthe stem or shank, and to facilitate the fitting together of the variousparts. These objects I attain in the manner hereinafter set forth,reference being had to the accompanying drawings, in which- Figure 1 isa side view, partly in section, of a wrench constructed in accordancewith my invention. Fig. 2 is a transverse section on the line a a,Fig. 1. Fig. 3 is a section on the line b b, Fig. 1; and Figs. 4 and 5are views similar to Fig. 1, but illustrating other modifications of myinvention In the wrench shown in Figs. 1, 2, and 3 the stem of thewrench is represented at 1, this stem being bent at one end, so as toform a clamping-jaw 2, and being composed of a central web 3, withprojecting edge fianges 4, so as to form a bar of substantiallyH-shapedcross-section, as shown in Fig. 3, the flanges extending around the bentend or jaw of the wrench, so as to obtain the maximum of strength withthe minimum of weight. Movable on the stem 1 is a slide 5, having wingsembracing the stem and projecting forwardly beyond the same, these wingsbeing slotted, as shown by dotted-lines in Fig. 1, and the forward endsof the wings forming bearings for projecting pivot pins or trunnions 6on a lever 7 the outer portion of which constitutes a guide for a rod y8, carrying a universallypivoted jaw 9, between which and the jaw 2 theobject to beheld is firmly clamped. The inner end of the rod 8terminates in jaws 10, which embrace flanges 11, formed upon a cam-lever12, which plays within a forked portion of the lever 7 and is hungthereto by means of a transverse pin or rivet 13, as shown in Fig. 2.

For the purpose of strengthening the camlever 12, the iianges 11 arecontinued around the same, except at one point 14, this gap in theflanges permitting the ready engagement of the jaws l0 with the sameeither before or after the rod 8 has been inserted in its place in thelever 7 and before the cam-lever 12 has been hung to said lever 7 bymeans of the transverse pin or rivet 13.

Between the lever 7 and the face of the stem 1 of the wrench isinterposed a shoe 15, which has wings 16 embracing said stem andcontained within the slots in the wings of the slide 5, and this shoehas a projecting lug 17, which engages with a corresponding recessformed in the face of the lever 7, immediately below the projectingpivot pins or trunnions 6 of the same. Hence the power of said lever 7is exerted upon the shoe 15 at a point close to the fulcrum of saidlever and in a direction substantially at right angles to the shoe, soas to press the same firmly against the stem 1 of the wrench andeffectually prevent any slipping of the slide 5 thereon.

In Fig. 4 I have shown my invention applied to a clamp in which a beamor bar 18 takes the place of the stem 1, the jaw 2 having a yoke 19embracing this beam and secured thereto by means of a wedge 20. In thisform of the device also a screw-stem 2l, adapted to a nut 22 on thelever 7, takes the place of the cam-lever 12 and sliding rod 8.

In the wrench shown in Fig. 5 the screwstem and lever, with nut for thereception of the same, are also employed, and in this case a small shoe23 bears upon the face of the stem 1 of the wrench and is carried by thelever 7, said shoe being located at a point corresponding with the lug17 of the shoe 15, so as to obtain the same result of powerful leverageand direct thrust for which said lug is employed. Y

Having thus described my invention, I claim and desire to secure byLetters Patent- 1. The combination in a wrench, of a stem or barhaving-a projecting jaw, a slide movable on said stem and having a leverpivoted thereto, a clamping device carried by the le- IOO ver, and ashoe interposed between the lever and stern and projecting into saidlever below the pivot of the same,w hereby a direct push of the shoeagainst the stem or bar of the Wrench is effected, substantially asspecified.

2. The combination in a wrench, ofthe stein or bar having a projectingjaw, a slide having projecting Wings, With slots therein, a lever havingtrunnions pivoted to said wings, a shoe interposed between the lever andthe stem of the Wrench, and having wings contained Within the slots 0fthe slide, and elaniping mechanism carried by the lever, substantiallyas specified.

3. The combination in a wrench, ofthe stein having a projecting jaw, aslide having a pivoted lever, a @lamp-rod guided on said lever andhaving jaws at its inner end, and a cam-lever hung to the main lever andhaving an edge flange for engaging with the jaws of the clamp-rod, saidedge lange having agap,

JAMES MCNUT'I.

Witnesses:

F. E. BEeHToLD, Jos. H. KLEIN.

